Just got my OXM (Official Xbox Magazine) and went to the NGII page, they interviewed Itagaki and asked about the demo heres the exact words "And when we grilled about the possibility of a playable demo before the game's release, he grinned sheepishly and cracked: "Of course! Everyone's waiting for it, right? I know this, man!" so If you ask me i would say thats a confirmation, although it does not say when. It also mentions that we will get to use the claws in the second stage. Also I dont understand this for sure but i think there will be another playable character besides Ryu, heres what it says: "We wont see any other playable characters besides Ryu" Ok so you think just Ryu then, right? then it says (which confuses me): " ,to the Rachel in Sigma ("we'd have to make[the other playable character] as cool or cooler than Hyabusa "). So does that mean Rachel is playable again, or nobody but Ryu, or some new guy that they have to make cooler or as cool as Ryu.......hmmm.

I'm not sure if he's saying Rachel will be playable. I would be happy though. They better give her the whip she was supposed to get in Sigma. If there is another playable character, I think it'll be Genshin. He was mentioning how cool he is in various previews.

I never heard his name in Ninja Gaiden or Ninja Gaiden black, where is he mentionned?

He's a new character in Ninja Gaiden II.
Name was said in an interview and Itagaki described him as a ruthless leader and kills anyone who fails in a mission.
Most scary part is the fact that Itagaki bases his own character into Genshin _________________